It's bad for sure ...but Waco think what would happen if someone less experienced than you got them and decided totry some hot rocket loads out of them ....
That is why I think you should let Winchester know just in case there are more then those out there.
A few years ago I bought 5000 WLR primers. They kept blowing out the sides ( right where the 90 deg bend was that formed the cup)
Not bad for me because I was using light cast bullet loads. Did cut into my bolt face however.
I Called Winchester and they were not aware of the problem but promptly replaced the primers and took the others back for inspection.
3 weeks later there was a national recall on that lot number. It came from only one of their facilities.
Jim